PU logic error

What does 5092 mean?

The memory within the drive's Power Unit has been cleared, indicating a loss of configuration or operational data. This internal fault requires expert diagnosis to restore functionality and prevent reoccurrence, as it affects the core logic of the power unit.

• Loss of internal battery backup for RAM, causing volatile memory (e.g., P-parameters) to clear upon power cycle.
• Internal hardware fault in the drive's control board or memory module.
• Severe voltage transient or power disturbance corrupting memory.
• Firmware update failure or interruption, leading to incomplete data write.
• Electromagnetic interference (EMI) causing memory corruption.

Click steps to track your progress.

1. 1

   Perform a full drive reset (e.g., parameter P9-01 = 1) and re-upload drive parameters from a saved backup file.

2. 2

   Verify the drive's internal battery (if equipped) for proper voltage (e.g., 3VDC lithium cell).

3. 3

   Check the drive's event log for preceding power supply faults or transients.

4. 4

   If parameter backup is unavailable, re-enter all parameters manually based on commissioning records.

5. 5

   Isolate the drive from potential EMI sources by improving grounding or shielding of control cables (per EN 61800-3).